Question : When a body is immersed in a liquid, the force acting on it is:

Option 1: Upthrust

Option 2: Weight

Option 3: Mass

Option 4: Both 1 and 2

Question : Venturi meters are used to measure:

Option 1: Rate of flow of liquids

Option 2: Liquid pressure

Option 3: Surface tension

Option 4: Liquid density

Question : The point where the total mass of a body is supposed to be concentrated is known as

Option 1: dead centre

Option 2: centre of mass

Option 3: centre of gravity

Option 4: centre of motion

Question : Specific gravity is defined as the ratio of

Option 1: density of the substance to the density of the water.

Option 2: density of the substance to the density of the water at 0^oC.

Option 3: density of water at 4^oC to the density of the substance.

Option 4: density of the substance to the density of the water at 4^oC.

Question : The weight of a body acts through the centre of

Option 1: gravity

Option 2: mass

Option 3: Both (1) and (2)

Option 4: buoyancy